Answer this question truthfully
### Question: What to expect if I have Birthmarks-pigmented  (Outlook/Prognosis)?
### Response: Large moles that are present at birth (congenital nevi) are more likely to become skin cancer (malignant melanoma). This is especially true if the mole covers an area larger than the size of a fist. The cancer risk is related to the size, location, shape, and color of the mole.
Mongolian spots may persist for months or years. They do NOT become cancer or develop other symptoms.